Why the context path effect is disappeared after deploying WAR?

[wayne yeh]

I put a website.WAR file in /webapps folder, and set the context of tomcat/conf/server.xml in the following way:

<Host name="localhost"  appBase="webapps" unpackWARs="true" autoDeploy="true" xmlValidation="false" xmlNamespaceAware="false">
　　<Context path="/" docBase="/webapps/website" debug="0" reloadable="true" crossContext="true"></Context>
</Host>

Therefore I can use http://ip/ to browse the web pages located in /webapps/website folder. When I want to re-deploy the WAR by a modified one, tomcat just deploy the new WAR file. Everything looks fine, but I cannot use http://ip/ to browse anymore. Instead, I have to type http://ip/website to browse the same page. The setting of context path seems to be inactive.

Does anyone know how I can keep the effect of context path after trying to re-deploy the website?